[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 27.420386] random: sshd: uninitialized urandom read (32 bytes read) [ 27.890787] audit: type=1400 audit(1538974166.341:6): avc: denied { map } for pid=1769 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 [ 27.955426] random: sshd: uninitialized urandom read (32 bytes read) [ 28.412788] random: sshd: uninitialized urandom read (32 bytes read) [ 92.475690] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.57' (ECDSA) to the list of known hosts. [ 97.978247] random: sshd: uninitialized urandom read (32 bytes read) [ 98.071896] audit: type=1400 audit(1538974236.521:7): avc: denied { map } for pid=1823 comm="syz-execprog" path="/root/syz-execprog" dev="sda1" ino=16479 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 2018/10/08 04:50:37 parsed 1 programs [ 98.599400] audit: type=1400 audit(1538974237.041:8): avc: denied { map } for pid=1823 comm="syz-execprog" path="/sys/kernel/debug/kcov" dev="debugfs" ino=5004 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:debugfs_t:s0 tclass=file permissive=1 [ 99.211703] random: cc1: uninitialized urandom read (8 bytes read) 2018/10/08 04:50:38 executed programs: 0 [ 100.531246] audit: type=1400 audit(1538974238.981:9): avc: denied { map } for pid=1823 comm="syz-execprog" path="/root/syzkaller-shm286565088" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:file_t:s0 tclass=file permissive=1 [ 107.803906] audit: type=1400 audit(1538974246.251:10): avc: denied { create } for pid=4478 comm="syz-executor3" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 2018/10/08 04:50:46 executed programs: 6 [ 107.836192] audit: type=1400 audit(1538974246.281:11): avc: denied { write } for pid=4478 comm="syz-executor3" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 [ 107.860217] audit: type=1400 audit(1538974246.281:12): avc: denied { read } for pid=4478 comm="syz-executor3" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 INIT: Id "1" respawning too fast: disabled for 5 minutes INIT: Id "5" respawning too fast: disabled for 5 minutes INIT: Id "2" respawning too fast: disabled for 5 minutes INIT: Id "6" respawning too fast: disabled for 5 minutes INIT: Id "3" respawning too fast: disabled for 5 minutes INIT: Id "4" respawning too fast: disabled for 5 minutes [ 112.010828] kasan: CONFIG_KASAN_INLINE enabled [ 112.015446] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 112.023369] general protection fault: 0000 [#1] PREEMPT SMP KASAN NOPTI [ 112.030122] Modules linked in: [ 112.033337] CPU: 0 PID: 4812 Comm: blkid Not tainted 4.14.74+ #17 [ 112.039550] task: ffff8801c538af00 task.stack: ffff8801d44b0000 [ 112.045590] RIP: 0010:bd_set_size+0x58/0x320 [ 112.049977] RSP: 0018:ffff8801d44b7c78 EFLAGS: 00010202 [ 112.055336] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff10038a716e5 [ 112.062590] RDX: 00000000000000a7 RSI: 0000000000000000 RDI: 0000000000000538 [ 112.069854] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 [ 112.077102] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d53f3980 [ 112.084360] R13: ffff8801d53f3980 R14: ffff8801cd6db2c8 R15: ffff8801cd6db4a8 [ 112.091608] FS: 00007f82777c3740(0000) GS:ffff8801dba00000(0000) knlGS:0000000000000000 [ 112.099813] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 112.105673] CR2: 00007f0d437bf6f0 CR3: 00000001d6098002 CR4: 00000000001606b0 [ 112.112946] Call Trace: [ 112.115515] loop_clr_fd+0x465/0xac0 [ 112.119206] ? lo_compat_ioctl+0x130/0x130 [ 112.123420] lo_release+0xfd/0x190 [ 112.126944] __blkdev_put+0x526/0x6e0 [ 112.130723] ? bd_set_size+0x320/0x320 [ 112.134590] ? locks_remove_file+0x2de/0x450 [ 112.138976] ? blkdev_put+0x4d0/0x4d0 [ 112.142758] ? blkdev_put+0x75/0x4d0 [ 112.146450] ? blkdev_put+0x4d0/0x4d0 [ 112.150245] blkdev_close+0x86/0xb0 [ 112.153850] __fput+0x25e/0x6f0 [ 112.157110] task_work_run+0x116/0x190 [ 112.160982] exit_to_usermode_loop+0x12e/0x150 [ 112.165541] do_syscall_64+0x35d/0x4b0 [ 112.169411] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 112.174592] RIP: 0033:0x7f82770cb2b0 [ 112.178285] RSP: 002b:00007ffc5935b6e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 112.185982] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f82770cb2b0 [ 112.193242] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 112.200486] RBP: 0000000000000000 R08: 0000000000000028 R09: 0000000001680000 [ 112.207730] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000012df030 [ 112.214981] R13: 0000000000000000 R14: 0000000000000003 R15: 0000000000000005 [ 112.222230] Code: 03 80 3c 02 00 0f 85 a4 02 00 00 49 8b 9c 24 e0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d bb 38 05 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 70 02 00 00 4d 8d 6c 24 08 48 8b 9b 38 05 00 [ 112.241299] RIP: bd_set_size+0x58/0x320 RSP: ffff8801d44b7c78 [ 112.247535] ---[ end trace b30f3181cdad60ae ]--- [ 112.252319] Kernel panic - not syncing: Fatal exception [ 112.257955] Kernel Offset: 0x29c00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 112.268858] Rebooting in 86400 seconds..